生活型

herb

形態特徵

• Herb; stem prostrate to ascending, sericeous on the upper side; stipules free, linear-lanceolate, ca. 1 mm long, sparsely sericeous.
• Leaves green, usually with an elongate purple spot centrally, elliptic or oblong to falcate, 6–13 mm long, to 3 mm wide, acute to obtuse at apex, obliquely rounded at base, serrulate or rarely entire, sparsely sericeous to glabrous above, sericeous below; petiole ca. 1 mm long, sparsely sericeous abaxially.
• Cyathia solitary at nodes, usually on short, congested lateral branches; involucres 0.7–1 mm long, sericeous outside, pilose inside; stalks 0.5–1.2 mm long, lobes deltoid to linear-lanceolate, ciliate at margin; glands 4, yellowish green, rounded to transversely elliptic or oblong, ca. 0.3 mm long; appendages white to reddish, depressed obovate, entire or undulate, up to 0.5 mm long, 0.3 mm wide; bracteoles acicular to linear. Male flowers 4–5; anthers red. Female flowers with sericeous pedicel and ovary; style and stigma to 0.3 mm long.
• Capsules trigonal-ovoid, to 2 mm long, 2 mm diam., exserted, slightly nutant, sericeous, the pedicels to 1.2 mm long; seeds grayish to reddish, tetragonal, oblong-ovoid, ca. 1.1 mm long, 0.7 mm diam., transversely rugose.

分布

• 台灣 : Taiwan. Locally, the species grows along street sides, median strip of street, and crevices of tile-paved roads.
• 世界 : his species is distributed throughout North America except the extreme north, and naturalized in Taipei City.

引證標本

TAIPEI: Neihu, Lin et al. 687; Nankang, Chaw & Lin 995.

參考文獻

• HUANG, TSENG-CHIENG. Flora of Taiwan, second edition 3: 439. (Fl. Taiwan 2nd edit.)